Press



May 22, 1928.

J. M. CRAIGO PRESS Filed. Dec. 10, 1924 2 She'BQS-Sht l Swarm Mo's May22, 1 928.

J. M. cRAleo PRESS Filed 1360- 1 1924 2 Sheets-Sheet 2 a a I w PatentedMay 22,1928.

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JOHN M. GRAIGO, OF HARTFORD, CONNECTICUT.

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Application filed December 10, 1924. Serial No. 754,947.

The present invention relates to a press for bending, embossing,cutting, or otherwise manipulating metal, and finds peculiaradaptability in dental Work.

The aim of the invention is to provide a press of the characterdescribed having various features of novelty and advantage and which isparticularly characterized by its efi'ectiveness in operation, itssimplicity in construction, and the ease and facility with which it maybe set up and operated.

Other vobjects will be in part obvious and in partpointed out more indetail hereinafter.

The invention accordingly consists in the features of construction,combination of ele ments and arrangement of parts which will beexemplified in the construction hereinafter set forth, and the scope oft-he'application of which will be indicated in the appended claims.

In the accompanying drawings, wherein I have shown, for illustrativepurposes, one form which 'theinvention may take:

Figure 1 is. a front View of my improved press;

Fig. 2 is a sid view thereof;

Fig. 3 is a view taken substantially on line 3..3 of Fig. 1, and showsthe horizontally disposed turret in central Vertical section;

Fig; 4; is a vertical sectional view taken s-ubst-antially on line 44 ofFig. 1, and shows the device for holding the vertically disposed turretin indexed position;

Fig, 5 is a perspective view of a crown and clasp, certain operations onwhich may be performed by the use of the present'rnachine;

Fig. 6 is a detail view of a-pairof cooperating dies which may beemployed to form a stress-breaking lug or projection on the crown of atooth, the crown and the clasp thereonbeing shown in section, and theparts properly positioned between thedies by the use of; an improvedtemplate or guide;

Fig. 7 is a view similar to Fig. 6 but showing the position of the partswhen the dies haTve been brought together; and

' 8 is a view showing, in perspective, th die of Fig 6 an in tance f aus to wh my i proved press may be applied, reference may be had to themanufacture of attachments for holding artificial bridges, plates orother ort odqnt a appl ance in the out a more part cularly, to the manfactu e of a clasp and crown such as shown in Fig. 5

are made the subject matter ofa separate applicat on. It 1s, of courseunderstood 'of. the accompanying drawings and which that, while thepress is herein described as being applied for certain operationsnponthe clasp and crown shown, the press has a more general appl catiomthepresent dis.

closure being by way of exemplification only and is not to be taken asrestrictive of my conception.

Referring to the drawings in detail, the press is illustrated as havinga base 10 from which arises a standardor housing 11 to the forward upperend ofwhich is pivoted, as at12, an operating handle 13. The standard 11is provided at each side with a pair of guides 14 in which is mountedfor vertical sliding movement rods or bars F ixed to-the's'e bars is aram 17 on the front face of which is fixed a rotatable tool carryingturret The ram is connected to the lever by. a link 19, the arrangementbeing such that this link and the lever acts in the nature of a toggleso that the desired amount'of power may be obtained when the handle 13is operated to perform the several punch ing operations. The numeral 20designates,

generally, a horizontally disposed I turret carried by the] bed 10rearwardly of the plane of the vertically disposed turret 1?. The turret18 is journalled on a screw 21, and the turret 20 on a screw'22.Angularly disposed about the periphery of the turret l8 arejthe dies orpunches 25 25 25", 25,

and 25 Each of these dies comprises an arm extending radially from theturret 18' and an active die element on the extreme end of the arm.Provided on the turret 20 are the dies 26, 26, 26 and 26 which areadapted to respectively "cooperate with the dies'25, 25225 and 25 of theother turret.

" Each of the dies on the turret 20 comprises an arm extending radiallyfrom that turret, each .arm ha-ving on its upper side and adjacent itsouter end an active die element or portion. There may be provided adieon the turret 20 for cooperation with the punch 25*. It is, "of course,-unders't'ood that'the number of dies on each turretwill depend upon theparticular use-to which the press is to be applied, and't hat the constr-ijction of these dies may be varied, as desired.

For the purpose of holding the vertical turret 18 in any desired indexedposition, he u ret is no hedya a B n dapted- 'to selectively engage inthese notches is aslidable pin 31 carried by the ram and normally urgedinto engaging position by a spring 32. When it is desired to rotate theturret 18 to a new indexed position, the pin or plunger 31 may bewithdrawn by swinging handle 33 fixed on a rotatable stud 34 having afin 35 engaging in a notch 36 in the pin. For the purpose of holding thehorizontally disposed turret in any pre-.

determined indexed position, this turret is provided with notches 37' inwhich is adapted to selectively engage a finger or pin 38 carried by astud 39 rotatably mounted in the bed 10. On the outer end of this stud39 is a handleetO, the stud being, normally urged into engaging positionby a spring 41. It is obvious that the arrangements for holding theturrets in indexed positions may be varied as desired. 4-2 denotes a setscrew "for limiting the extent of movement of the op erating lever 13 ina direction to bring the dies into cooperativerelation.

In the present illustrative disclosure, one of the'dies, in the presentinstance die carried by the vertically disposed turret 18, is offset tothe plane of the turret, as disclosed most clearly in Fig. 2, in orderto accommodate a set of teeth or bridge work behind that portion of theram to which the vertical turret is secured, for example, in some 1n-.stances it may be desirable to operate upon a clasp carried at one endof a curved bridge or saddle and, in this instance, there will besufficient space above thedies to permit the saddle to be held with theclasp between the cooperating dies and the upper end of the saddlebehind the turret 18. The ram'immediately above the turret is cut awayas at 43 in order to accommodate the offset die 25 when it is desired torotate the turret.

One or more of the dies may be provided with means for properly locatingthe work with respect to the dies. In the present instance, this meansis conveniently shown as being in the form of a spring finger 45conrfected by a screw 46 to the arm which carries the die 26 The forwardend of this spring lies immediately over the operative part of the die26 and the cooperating die 25 is recessed as at 47 in order toaccomodate the free end of the spring when the dies are broughttogether, as shown in Fig. 7. It is, of course, understood that thiswork positioning means may take a form other than that illustrated.

As previously stated, my improved press is peculiarly adapted for use indental work. For the purpose of explaining one particular use to whichthe press may be applied, I have shown, in Fig. 5, an attachment forteeth which includes a crown 50 adapted to be connected to a permanenttooth in the mouth and a clasp 51 to which is adapted to be fixed aplate or bridge, not shown...

From this figure, it will be seen that the clasp has a'pair of armsadapted to straddle the crown, and vided with a notch 52 adapted toaccommodate a stress-breaking lug or projection 53 on the crown. Eacharm of the clasp is further provided with a pair of recesses 54 and 55which are adapted to receive the respective projections 56 and 57 onthecrown when the clasp is slipped into place.

The operation of the press, when employed for making the crown and claspjust described, briefly as follows, it being understood, however, thatthe press is adapted for making dentures of other sorts than that hereshown. I One pair of cooperating dies; for instance the dies 25 and 26may be so constructed as to cut out the notches 52. The turrets will,therefore, be indexed so as to bring; the die 25 immediately above thedie 26" and,'at'ter the work is positioned between these dies, the lever13 is moved so as to lower the ram and thereby bring the dies together.The recesses 54 and 55 may then be formed by indexing theturrets so thatthe dies 25 and 26 are in proper relation, properly positioning theclasp between the dies, and then lowering the ram by mov-' ing the lever13. The clasp may now be slipped over the crown 50 and positionedbetween the properly indexed dies 25 and 26 as shown in Fig. 6 for thepurpose of form-. ing the rests or stress-breaking bosses 53. The guideor locating device 45 is of the greatest importance in that, by its use,the crown and clasp may be properly positioned with respect to the diesso that the lug 53, which is to be formed, properly registers with anotch 52. This will be clearly understood from Figs. 6, 7 and 8. In Fig.6, it will be seen that the free end of the spring 45, which is invertical ,alinement with the punching portion of the die 26 and therecess 47 fits in the notch 52, thereby properly locating this notchwith respect to'the dies. hen the boss 53 is formed by bringing'the diestogether, the free end of the spring 45 is accommodated by the recess 47of the upeach of these arms is pro per die so that injury to theindicator or respect to the plane of the turret substantially asdescribed, and means for holding said turrets in indexed positions.

2. In a machine of the character 'described, a bed, an indexible turretthereon provided with angularly disposed dies, means for holding saidturret indexed.

positions, a ram mounted for movement towards and away from said turretand axially thereof, an indeXible turret on said ram and disposed atright angles to said first turret, dies about the periphery of saidsecond turret and paired with the first mentioned dies, one of the diesof said second turret being offset from the plane of said turret and aspace being provided behind said ram and above said die to accommodatepieces of work, means for holding said second turret in indexedpositions, and. means for moving said ram.

3. In a machine of the character described. a pair of turrets disposedin planes normal to each other, the axes of said turrets lying in aplane which is normal to both of said mentioned planes, arms angularlydisposed on, and extending radially from, each of said turrets, a dieelement on the extreme end of each arm of one turret, die elements onthe side, and adjacent the outer end of, each arm of the other turret,the outer ends of the last mentioned arms being arranged to be encircledby a crown or the like, the die elements on one turret havingcooperativerelation to the respective die elements on the other turret,means for holding said turrets in indexed positions, and means forrelatively movlng sald turrets towards and away from each other.

adapted to receive said punching portion,

and a member between said dies for locatmg a piece of work in properangular positions relative to one of said dies, saidmem-- her beingalined with said recess and adapted to move thereinto when the dies arebrought together.

5. In combination, an arm adapted to be encircled by a crown or the likeand having a male die with a punching portion, a female die movablerelative to said male die and having a recess adapted to receive saidpunching portion, and a spring between said dies for locating the workrelative thereto, said spring beingalined with and adapted to move intosaid recess when the dies are brought together.

JOHN M. CRAIGO.

